摘要:
An apparatus for determining an initial flow rate (Q) of a liquid in a conduit (10), comprising: (a) a means (20, 22, 70, 90) for introducing a change of a known volume of liquid over a known time to the initial flow rate (Q); (b) a sensor (50, 50', 50", 72, 92) located downstream from the point for where a known liquid volume over a known time is introduced, the sensor (50, 50', 50", 72, 92) measuring a flow corresponding parameter; and (c) a controller (100) connected to the sensor (50, 50', 50", 72, 92), the controller (100) being configured to determine the initial flow rate (Q) in response to the relative change (Cd) in the flow corresponding parameter downstream from where the flow is changed and the introduced known liquid volume over a known time, corresponding to Q = Q i C d , where Cd = ΔQd/Qd is the relative change in the measured flow corresponding parameter.
摘要:
A system for measuring blood flow rate by thermodilution, the system including a controller and a thermodilution catheter (10), the thermodilution catheter (10) having a thermal dilution sensor (36), an indicator lumen (32) and an injection port (34) selected to pass a thermodilution indicator from the thermodilution catheter (10), the system is characterized in that the controller is selected to compensate for a temperature change of the thermal dilution sensor (36) resulting from the thermodilution indicator within the indicator lumen (32).
摘要:
A system for measuring blood flow rate by thermodilution, the system including a controller and a thermodilution catheter (10), the thermodilution catheter (10) having a thermal dilution sensor (36), an indicator lumen (32) and an injection port (34) selected to pass a thermodilution indicator from the thermodilution catheter (10), the system is characterized in that the controller is selected to compensate for a temperature change of the thermal dilution sensor (36) resulting from the thermodilution indicator within the indicator lumen (32).
摘要:
A catheter for retrograde orientation in a blood flow is used to determine the blood flow rate by thermodilution measurements. The determination of the blood flow rate accommodates injectate induced thermal influences on a dilution thermal sensor, wherein the thermal influences can occur prior to introduction of the injectate into the blood flow.
摘要:
A catheter for retrograde orientation in a blood flow is used to determine the blood flow rate by thermodilution measurements. The determination of the blood flow rate accommodates injectate induced thennal influences on a dilution thermal sensor, wherein the thermal influences can occur prior to introduction of the injectate into the blood flow.
摘要:
A catheter for retrograde orientation in a blood flow is used to determine the blood flow rate by thermodilution measurements. The determination of the blood flow rate accommodates injectate induced thennal influences on a dilution thermal sensor, wherein the thermal influences can occur prior to introduction of the injectate into the blood flow.
摘要:
An apparatus for determining an initial flow rate (Q) of a liquid in a conduit (10), comprising:
(a) a means (20, 22, 70, 90) for introducing a change of a known volume of liquid over a known time to the initial flow rate (Q); (b) a sensor (50, 50', 50", 72, 92) located downstream from the point for where a known liquid volume over a known time is introduced, the sensor (50, 50', 50", 72, 92) measuring a flow corresponding parameter; and (c) a controller (100) connected to the sensor (50, 50', 50", 72, 92), the controller (100) being configured to determine the initial flow rate (Q) in response to the relative change (Cd) in the flow corresponding parameter downstream from where the flow is changed and the introduced known liquid volume over a known time, corresponding to Q = Q i C d , where Cd = ΔQd/Qd is the relative change in the measured flow corresponding parameter.
摘要翻译:一种用于确定导管(10)中的液体的初始流速(Q)的装置,包括:(a)用于将已知体积的液体的变化引入已知体积的装置(20,22,70,90) 时间到初始流量(Q); (b)传感器(50,50',50“,72,92),其位于已知液体体积在已知时间被引入的点的下游,所述传感器(50,50',50”,72,92) )测量流量对应参数; 连接到传感器(50,50',50“,72,92)的控制器(100),所述控制器(100)被配置为响应于相对变化来确定初始流量(Q) Cd)在对应于Q = Q i C d的已知时间内的流动相关参数下游的流动对应参数和引入的已知液体体积,其中Cd =“Qd / Qd”是测量流量的相对变化对应 参数。